Is your VPN binary built for this CPU? Read the ELF header

Both files are 32-bit and only one of them runs on your board. An ELF32 build for Intel and an ELF32 build for ARM agree on the class field and disagree on everything that matters. A download page offering a 32-bit option has told you almost nothing until you read the header of the file you actually downloaded. Renaming it does not change a single instruction.

Class and machine answer different questions

The class field says whether the file uses 32-bit or 64-bit structures. The machine field names the instruction set the file was compiled for. Reading only the first is how an x86 build lands on an ARM board with a filename that looks perfectly plausible. Both values come from the same command, which is why skipping one is so easy.

The same confusion applies to 64-bit labels, where aarch64 and x86-64 share a word size and no instructions at all. A vendor page that lists one 64-bit download is describing its own build, not your machine. Check the header of the file rather than the column heading on the page.

readelf -h ./vendor-vpn
readelf -l ./vendor-vpn | head -20
file ./vendor-vpn

The first command prints the header, including class and machine. The second shows program headers, which is where an interpreter request lives. The third gives you one line when a table is more than you need.

Adding execute permission or patching a distribution check does not translate anything. Emulation, where the platform supports it, is a deployment decision with its own performance and dependency cost.

Read the header before running the installer

Inspect a trusted artifact before you execute anything from it. An installer that fails halfway can leave libraries replaced and nothing working, which is a worse starting point than the archive you began with. Header inspection is read-only and reversible in the sense that nothing on the system changes.

Compare the machine field against the package architecture of the running system, not against the marketing name of the board. A 64-bit CPU running a 32-bit userland needs the 32-bit build, and that detail decides which download is native. The board capability is not the constraint; the installed userland is.

dpkg --print-architecture
uname -m
getconf LONG_BIT

The first command reports the architecture the system installs packages for, which is the value that has to match. The other two describe the kernel and the word size, and they can disagree with the userland on a multiarch install.

When those answers disagree, decide which one the vendor supports before downloading another archive. Guessing produces a loop of installs that each fail at a different point, and each failure looks like a new problem.

Check the interpreter, not just the architecture

A dynamic executable records the loader it expects in a program header. On a system with a different loader path the kernel refuses to start the file even though the machine field matches exactly. That is the failure that sends people looking for missing libraries.

The error message tells you which case you are in, and the two cases are easy to confuse. A format or architecture rejection differs from a missing file or interpreter, and only one of them is fixed by installing another package.

readelf -l ./vendor-vpn | grep -A1 INTERP
ls -l /lib64/ld-linux-x86-64.so.2

The first command shows the interpreter path the binary requests. The second checks whether that path exists, which separates a wrong build from a missing loader.

Do not run a dependency lister against an untrusted binary, because some implementations can execute the file they inspect. Keep the inspection read-only and resist adding loader symlinks to make an unsupported build start.

Ask for a build with the facts in hand

Send the vendor the OS release, the package architecture, the class and machine values and the first error message. That combination earns a useful answer, while a screenshot of a generic failure earns a support template.

Keep the binary question separate from the configuration question. Once the correct build starts, profiles, credentials and routes are still their own problems, and no amount of profile editing will make a wrong-architecture binary run.